9ZX21901BKLFT

9ZX21901BKLFT is a 19 output differential Z-buffer for PCIe Gen2/3 and QPI with an adjustable external feedback path allowing the user to eliminate trace delays from their design. It is suitable for PCIe Gen3 or QPI applications. The part is backward compatible with PCIe Gen1 and Gen2. The device maintains low drift for critical QPI applications. In bypass mode, the IDT9ZX21901 can provide outputs up to 400MHz. Application includes 19 output PCIe Gen3/QPI buffer with adjustable feedback for Romley platforms.

• 19 to 0.7V current mode differential HCSL output pairs
• External feedback path, adjustable input-to-output delay
• 9 selectable SMBus addresses/ multiple devices can share same SMBus segment
• 8 dedicated OE# pins/ hardware control of outputs, PLL or bypass mode/can dejitter incoming clock
• Selectable PLL BW/ minimizes jitter peaking in downstream PLL's
• Spread spectrum compatible/tracks spreading input clock for EMI reduction
• SMBus interface/ unused outputs can be disabled
• 100MHz and 133.33MHz PLL mode/ legacy QPI support
• Undriven differential outputs in power down mode for maximum power savings
• 72pin MLF package, temperature range from 0 to +70°C